Acoustic Echo Canceller White Paper
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منابع مشابه
Optimization of a noise reduction preprocessing in an acoustic echo and noise controller
In hands-free communications, the speech signal to be transmitted is disturbed by ambient noise and acoustic echo. So, a processing to reduce these disturbances must be performed before transmission. Classical solutions are cascaded structures where the acoustic echo canceller preceeds or follows the noise reduction system. Recently, we have proposed a new joint system where a noise reduction p...
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An overview of acoustic echo cancellation systems is presented. First the basics of echo’s, type of echo’s , why echo canceller are required and what are the difference between echo canceller are explained then the application where they can be used is discussed.. This paper presents applications of acoustic echo control and shows most recent solutions. For some selected applications (LEM) resu...
متن کاملJoint noise reduction and acoustic echo cancellation using the transfer-function generalized sidelobe canceller
Man machine interaction requires an acoustic interface for providing full duplex hands-free communication. The transfer-function generalized sidelobe canceller (TF-GSC) is an adaptive beamformer suitable for enhancing a speech signal received by an array of microphones in a noisy and reverberant environment. When an echo signal is also present in the microphone output signals, cascade schemes o...
متن کاملAn Echo Canceller Robust to Noise and Residual Echo
When we talk with hands-free in a car or noisy lobby, the performance of the echo canceller degrade because background noise added to echo caused by the distance from mouth to microphone is relatively long. It gives a reason for necessity of noise-robust and high convergence speed adaptive algorithm. And if acoustic echo canceller operated not perfectly, residual signal going through the echo c...
متن کاملEcho Cancellation Using NLMS Adaptive Algorithm
-This paper presents the Cancellation of an acoustic echo. Such echo canceller is essential to control the echoes generated by the acoustic coupling between the microphone and loudspeaker in hands free telephones or teleconferencing applications. Conventional acoustic echo canceller encounters problems like slow convergence rate (especially for speech signal) and high computational complexity a...
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